Off-topic (sorry) but I see you have Gato monoblocks and if those are the PWR-222s, how do you like them? I have been interested in them ever since my speaker manufacturer (Michael Kelly with Aerial Acoustics) became a Gato dealer (for a short while - no longer), and recommended using their amps with his speakers, and also based on this very positive review.
BTW, good luck figuring out the best thing for your speakers. Adding two subs to already good sounding speakers was probably the biggest improvement I have made to my system in 10 years. You have recommendations from a couple of pretty solid posters so far.